Best in Wall Bathroom Heater Options for Small Spaces
September 12, 2025
Finding the right in-wall or wall-mounted bathroom heater means balancing safety, installation type, and controls. Below is a concise overview of five relevant products to help you compare features at a glance.
Product
Type
Key Features
Heat Storm 1500 Watt Electric In-Wall Heater with WIFI
In-Wall (hardwired)
WiFi, 1500/750W selectable, digital thermostat
9815WH Large Capacity In-Wall Heater With Thermostat
In-Wall (120/240V)
1500W, louvered distribution, silent motor option
Dreo Wall Heater For Bathroom (ALCI Plug)
Plug-in Wall Heater / Space Heater
ALCI safety plug, 1500W, oscillation, smart control
This in-wall heater is designed to replace a standard outlet or fit a wall cavity and integrates built-in WiFi for remote control. It offers selectable power output modes (1500W or 750W) to adapt to room size and energy needs. The unit includes a digital thermostat with adjustable LED brightness for easier control in low-light environments. As an in-wall model, it requires appropriate electrical connections and mounting space behind the wall. For bathrooms, verify local electrical codes and waterproofing requirements before installation. The WiFi feature supports scheduling, which can be useful for pre-warming a bathroom on colder mornings.
9815WH Large Capacity In-Wall Heater With Thermostat
The 9815WH is a louvered in-wall heater designed for even heat distribution and quick warm-up. It supports 1500W output and can be configured for 120V or 240V wiring (factory set for 120V), offering flexibility for different home electrical systems. The louvered front helps spread air across a larger area while reducing hot spots. The unit emphasizes quiet operation with a copper motor and claims low noise levels suitable for bedrooms or bathrooms. Installation requires a wall cavity and proper electrical hookup; check compatibility with bathroom zones and any required damp-rated enclosures.
Dreo’s wall heater focuses on safety and fast heat delivery for bathroom use. It includes an ALCI anti-leakage plug, internal and environmental overheat protection, and an air outlet correction system to reduce malfunction risks. The heater uses PTC ceramic elements and an impeller design for rapid warmth. It also has adjustable oscillation (60°, 90°, 120°) to distribute heat more uniformly. Smart control options include Alexa/Google Home voice commands and the Dreo app for schedules, improving convenience for pre-heating. This model is suitable where a plug-in solution or surface-mounted wall option is preferred over hardwiring.
This Heat Storm model is a wall-mounted infrared heater with Wi‑Fi control. Infrared heat warms objects and people directly rather than only heating air, which can feel efficient in small bathrooms. The unit includes a touch screen and digital thermostat and comes with remote control. It features tip-over safety for surface-mounted installations but, as a wall-mounted model, check the recommended mounting height and clearance for damp environments. WiFi connectivity allows remote temperature adjustments and scheduling, which can be helpful for timed pre-heating routines.
The Dreo Smart Wall Heater is designed with bathroom-safe features including an IP24 waterproof rating, ALCI plug, flame-retardant materials, and overheat protection. It combines a PTC heating system with adjustable airflow (manual 30° adjustment) and a touch control panel plus remote. Smart integrations include app control and Alexa voice commands. The IP24 rating indicates splash resistance suitable for many bathroom locations, but confirm local code for exact mounting zones. This unit targets users who want smart control plus specific bathroom safety certifications in a compact wall-mounted design.
Buying Guide: How To Choose An In-Wall Or Wall-Mounted Bathroom Heater
Selecting the right heater involves several technical and practical considerations to match your bathroom layout, safety needs, and installation capability.
Safety Certifications And Ratings
IP Rating: For bathrooms, an IP24 or higher splash resistance rating is commonly recommended for wall-mounted units near wet areas.
ALCI / GFCI Protection: Models with an ALCI plug or built-in ground-fault protection reduce shock risk in damp environments.
Overheat / Tip-Over Protection: Important for preventing fire risk or shutoff in abnormal conditions.
Installation Type
In-Wall (Hardwired): Requires cutting a wall cavity and direct connection to house wiring. Offers a clean look but needs electrician work and compliance with local codes.
Wall-Mounted (Surface): Easier to install in many cases, may be plug-in or hardwired. Check manufacturer clearance and mounting instructions.
Ceiling Fan/Heater Combos: Provide ventilation + heat; consider when replacing an exhaust fan and light fixture.
Power, Coverage, And Type Of Heat
Wattage: 1500W is common for small to medium bathrooms; higher wattage heats faster but draws more current. Verify circuit capacity.
Infrared Vs Forced Air: Infrared warms objects and people directly; forced-air moves warm air through the room. Choose based on how quickly you want perceived warmth.
Oscillation / Louvers: Oscillating or adjustable louvers help spread heat more evenly in awkward layouts.
Controls And Smart Features
Thermostats: Digital thermostats allow precise temperature control and can save energy compared to fixed-output models.
Wi‑Fi / App Control: Remote scheduling is convenient for pre-heating before morning routines.
Voice Integration: Alexa/Google support adds hands-free convenience but confirm network security and privacy considerations.
Noise, Operation, And Comfort
Noise Level: Look for sones or manufacturer noise claims if the heater will be used in bedrooms or quiet spaces.
Airflow: High airflow models warm the room faster but may create drafts; quieter, radiant options provide still warmth.
Electrical Requirements And Local Code
Circuit Capacity: Confirm whether the heater requires a dedicated 15A or 20A circuit and whether your bathroom circuit can support the load.
Local Codes: Bathroom electrical zones (e.g., proximity to tubs/showers) may restrict mounting locations and require GFCI protection.
Professional Installation: Hardwired in-wall units typically require a licensed electrician for safe and code-compliant installation.
Comparison Perspectives
Safety-Focused: Choose models with IP ratings and ALCI/GFCI protection for direct bathroom placement.
Smart Convenience: Wi‑Fi or app-enabled units offer scheduling and remote control — useful for pre-heating without leaving the bed.
Installation Preference: Pick plug-in or surface-mounted models for easier DIY installation; select hardwired in-wall units if you want a flush, permanent look.
Ventilation Integration: Consider fan+heater combos when replacing exhaust fans to combine moisture control with warming capability.
Evaluate the trade-offs between installation complexity, safety features, heating style, and smart controls to match the product to your bathroom layout and local regulations. Always follow manufacturer instructions and consult an electrician when necessary.
